An astronomer at Harvard College, Henrietta Leavitt, had discovered that these periods of brightness could be used to measure the star's distance from Earth.

VOA: special.2009.04.29

It will be able to measure small amounts of many different gases.

VOA: special.2009.12.30

The effect of a disease - or a condition like obesity - can be tallied by a measure called quality-adjusted life years lost.

VOA: standard.2010.08.10

Democrats and Republicans continue to argue what the true longer-term costs will be, with 10-year costs of the House measure put at more than $1 trillion.

VOA: standard.2009.12.25

But many analysts also say that may be a temporary situation, because they don't expect the measure to be taken up by the full House of Representatives.

VOA: standard.2010.03.19

The White House has declared the unemployment bill an emergency measure, meaning it does not have to be offset by spending cuts in other areas of the federal budget.

VOA: standard.2010.07.19

"The measure of success in Afghanistan will be that British forces can come home because Afghan forces are able to deal with the security problems of their country themselves,".

VOA: standard.2009.11.04

Senate Foreign Relations Committee Chairman John Kerry said after meeting the Pakistani envoy that the legislation does not need to be changed but that Qureshi would get written clarifications of terms of the measure he said have been inaccurately characterized by some quarters.

VOA: standard.2009.10.13